Environmental mitigation of sludge combustion via two opposite modifying strategies: Kinetics and stabilization effect

Chen, Jingjing1,2; Sun, Yongqi1,3; Shao, Ningning1,4; Zhang, Zuotai1,4

2018-09

10.1016/j.fuel.2018.04.113

FUEL   影响因子和分区

0016-2361

1873-7153

Nowadays, environmental mitigation remains a key issue challenging sludge combustion toward its clean utilization. Herein, two opposite additives, CaO and kaolin, representing two different strategies, were employed for environmental mitigation of sludge combustion. An advanced TG-MS (thermogravimetric-mass spectrometer) system was used. The online MS analysis indicated that kaolin remarkably decreased the release of NOx whereas the fixation effect of CaO on SO2 was more pronounced. Furthermore, the experiments using a fixed tube furnace proved that overall kaolin had a better role controlling volatility of trace elements (Cr, Ni, Cu, Zn, Pb, As and Ba) than CaO and we found that the fixation mechanism of CaO changed at 750 degrees C, whereas that of kaolin changed at 500 degrees C. Then the kinetics of the various stages during sludge combustion were investigated. We found that low temperature stages were along with the formation of new phases, whereas, at high temperatures, the diffusion could be rate-controlling step. The present study thus provides not only a deep understanding of sludge combustion mechanisms but also two effective modifying strategies toward the environmental mitigation of sludge combustion.

Sludge combustion Kinetic mechanism TG-MS Polluting gas Trace element

SCI ; EI

英语

第一 ; 通讯

Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control[2017B030301012]

Energy & Fuels ; Engineering

Energy & Fuels ; Engineering, Chemical

WOS:000438188600038

ELSEVIER SCI LTD

20181805132085

Barium compounds ; Kaolin ; Kinetics ; Lead compounds ; Temperature ; Trace elements ; Zinc compounds

Minerals:482.2 ; Thermodynamics:641.1 ; Chemical Agents and Basic Industrial Chemicals:803 ; Classical Physics; Quantum Theory; Relativity:931

ENGINEERING

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
2.Harbin Inst Technol, Sch Environm, Harbin 150091, Heilongjiang, Peoples R China
3.Univ Queensland, Sch Chem Engn, St Lucia, Qld 4072, Australia
4.Key Lab Municipal Solid Waste Recycling Technol &, Shenzhen 518055, Peoples R China

Chen, Jingjing,Sun, Yongqi,Shao, Ningning,et al. Environmental mitigation of sludge combustion via two opposite modifying strategies: Kinetics and stabilization effect[J]. FUEL,2018,227:346-354.

Chen, Jingjing,Sun, Yongqi,Shao, Ningning,&Zhang, Zuotai.(2018).Environmental mitigation of sludge combustion via two opposite modifying strategies: Kinetics and stabilization effect.FUEL,227,346-354.

Chen, Jingjing,et al."Environmental mitigation of sludge combustion via two opposite modifying strategies: Kinetics and stabilization effect".FUEL 227(2018):346-354.